| Name:
Agnatha; Thelodontiformes; Loganiidae; Loganellia sp.
Geological
Time: Middle Silurian (Wenlockian Stage)
Size (25.4mm=1
inch): 48 mm in length (if straightened) on a 30 mm by 19 mm matrix
Fossil Site:
Leshmagow, Scotland
Code: UKF43
Price: $325.00
 Description:
The Thelodontia are a group of fishes most commonly known from their
distinctive tooth-like scales. Indeed the term Thelodont , derived
from Greek, means nipple tooth. The teeth have a characteristic
crown made of dentine. The scales even on a single specimen are
quite variable. Thelodonts are rarely found as complete specimens;
those that are show them to be flattened fish, many of which were
bottom dwellers. Recent finds of intact specimens from Canada show
that they radiated into some deep-bodied forms that swam freely
in the water column. These deep-bodied forms may have been more
closely allied with jawed fishes than their other relatives. All
Thelodonts were extinct by the Upper Devonian.
Complete examples are quite rare, making this a
most desirable specimen. I’ve included a restoration of the
similar Lanarkia.
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